7 letters · 9 points in Scrabble
noun a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm
adjective triangular or suggesting a capital delta, with a point at the apex
originFrom Latin deltoideus, which was in turn from Ancient Greek adjective δελτοειδής (deltoeidḗs). See also: δέλτα (délta), the fourth letter of the Greek alphabet.
Etymology from Wiktionary, CC BY-SA 3.0